Lock for swing-sashes.



M. PEI'RUVIGS. LOCK FOR SWING SASHES. APPLICATION FILED MAR. 5, 1910.

@986Q84 Patented Mar. 7, 1911.

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MAX PETROVICS, OF NEW YORK, N. Y.

LOOK FOR SWING-SASHES.

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To all whom it may concern:

Be it known that 1, MAX Pn'rnovrcs, a citizen of the Kingdom of Hungary,residing in New York, in the borough of Manhattan, county and State ofNew York, have invented certain new and useful Improvements in Looks forSwingSashes, of which the following is a specification.

This invention relates to an improved lock for swing-sashes of that typewhich are used extensively with wire glass panes for factories, warehouses, oifice-buildings and the like, the lock permitting theswing-sash to be opened with great facility, held in position forventilation or cleaning, and returned and locked automatically intoclosed position.

In the accompanying drawings, Figure 1 represents a perspective view ofa swingsash window with my improved automatic locking device, Fig. 2 isa detail front-elevation showing the locking device at the upper part ofthe sash on a larger scale, and Fig. 3 is a side elevation of the parts,shown in Fig. 2.

Similar letters of reference indicate corresponding parts throughout theseveral figures.

Referring to the drawings, a represents the frame of a swing-sash ofthat type which are used for factories, storage warehouses, oflice andother buildings. The frame a is preferably made of sheet metal, whilethe pane is made of wire-glass. The swing-sash is pivoted slightly abovethe center of its height to the window-casing and swung into openposition for cleaning or ventilating purposes on fixed pivots Z).

The locking of the swing-sash is accomplished by means of a weightedlatch pivoted to ears f on the upper part of the window-casing andadapted to drop by gravity into engagement with a U-shaped catch f thatis attached to the upper crossrail of the swing-sash a. A wire cord orchain it is attached to the lower perforated end f of a knuckle 7, saidcord or chain being provided at the lower end with a ring it. The upperend of the knuckle f is rounded off so as to engage the lower end of theweighted catch 7. When the swing-sash is to be opened, the chain or cord72, is pulled in downward direction. This produces the lifting of theknuckle f and the lifting and releasing of the weighted latch 7 from thecatch 7, so that the swing-sash is moved Specification of LettersPatent.

Application filed March 5, 1910.

Patented Mar. 7, 1911.

Serial No. 547,490.

on its pivots 6 into inclined position for the purpose of ventilatingthe factory or other building. "When the chain it is released theswing-sash is returned by gravity into closed position, the latch fbeing also returned by gravity into its former position, and intoengagement with the catch f while the knuckle resumes its place underthe weighted latch The locking device of the swing-sash is therebyreturned to its normal position. The latch 7 may be held insubstantially horizontal position by a suitable stop or shoulder such asthe weather strip of the window frame as shown in Fig. 3. As in sOmefactories the swingsashes are arranged at a considerable height from thefloor, the operating chain or cord it has to be made of such a lengththat the swing-sash can be operated from the floor of the factory.

The pivots of the swing-sash are arranged slightly out of center in sucha manner that the lower part of the swing-sash is heavier than the upperpart in order to return the sash by gravity into closed position. Thepulling of the chain releases the weighted latch f from its catch f andcauses by continuing the pulling of the chain the opening of theswing-sash and the holding of the sash in open position, while on thereturn of the swing-sash into closed position the locking of theweighted latch to its catch is accomplished automatically, and theswing-sash locked in closed position as described.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

The combination, with a swing-sash arranged to be normally held inclosed position, of a locking device applied to the upper part of thesash and window and consisting of a base secured to the sash, a pair ofperforated members integral with the base and extending away from thesash, a catch-bar integral with the outer ends of said members, andhaving an outwardlyexposed beveled shoulder, a pair of cars secured tothe upper part of the window-casing, a latch pivoted at its inner endbetween said ears and extending outwardly away from the casing andhaving a weighted outer end having a downwardly-extending projectionhaving an inwardly-disposed shoulder adapted to engage saidoutwardlyexposed shoulder, a pin passed through said perforated members,a knuckle fulcrumed I y In testimony, that I claim the foregoing on saidpin and having a Weighted outer end as my invention, I have signed myname in adapted to engage under the weighted outer presence of twosubscribing Witnesses.

end of the pivoted latch, and having a per- MAX PETROVICS. forated innerend, a link in said perforated Vitnesses:

inner end, and means engaging said link for PAUL GOEPEL,

operating the knuckle. FANNIE FISK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

